We do electropolish (EP) and passivate our valves prior to shipping
The 'orange peel' is a common issue in the industry. After discussing this with our electropolisher, we came to the conclusion that the best choice is to mask the valve when the vessel is EP'd.
www.echosupply.com is a good source for masking materials.
Our EP facility uses this green tape for masking during the EP process:
http://www.echosupply.com/finishing-supplies-products.aspx?ID=95
Do you ep your valves? If you do, how do we prevent 'orange peel' when electropolishing vessels with your valves attached?
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